journalpump is a daemon that takes log messages from journald and pumps them to a given output. Currently supported outputs are Elasticsearch, Kafka and logplex. It reads messages from journald and optionally checks if they match a config rule and forwards them as JSON messages to the desired output.
To build an installation package for your distribution, go to the root directory of a journalpump Git checkout and then run:
Debian:
make deb
This will produce a .deb package into the parent directory of the Git checkout.
Fedora:
make rpm
This will produce an RPM in rpm/RPMS/noarch/.
Other:
python3 setup.py bdist_egg
This will produce an egg file into a dist directory within the same folder.
journalpump requires Python 3.4 or newer.
To install it run as root:
Debian:
dpkg -i ../journalpump*.deb
Fedora:
su -c 'dnf install rpm/RPMS/noarch/*'
On Fedora it is recommended to simply run journalpump under systemd:
systemctl enable journalpump.service
and eventually after the setup section, you can just run:
systemctl start journalpump.service
Other:
python3 setup.py install
On systems without systemd it is recommended that you run journalpump within supervisord or similar process control system.
After installation you need to create a suitable JSON configuration file for your installation.
If correctly installed, journalpump comes with a single executable,
journalpump that takes as an argument the path to journalpump's JSON
configuration file.
journalpump is the main process that should be run under systemd or
supervisord.
While journalpump is running it may be useful to read the JSON state file
that will be created as journalpump_state.json to the current working
directory. The JSON state file is human readable and should give an
understandable description of the current state of the journalpump.
Example:
{
"json_state_file_path": "/var/lib/journalpump/journalpump_state.json",
"readers": {
...
},
"statsd": {
"host": "127.0.0.1",
"port": 12345,
"tags": {
"sometag": "somevalue"
}
}
}
json_state_file_path (default "journalpump_state.json")
Location of a JSON state file which describes the state of the journalpump process.
statsd (default null)
Enables metrics sending to a statsd daemon that supports the influxdb-statsd / telegraf syntax with tags.
The tags setting can be used to enter optional tag values for the metrics.
Metrics sending follows the Telegraf spec.
log_level (default "INFO")
Determines log level of journalpump.
Reader configuration structure:
{
"readers": {
"some_reader": {
"senders": {
"some_log": {
...
},
"another_log": {
...
}
}
},
"another_reader": {
"senders": {
"some_kafka": {
...
}
}
}
}
}
Example configuration for a single reader:
{
"journal_path": "/var/lib/machines/container1/var/log/journal/b09ffd62229f4bd0829e883c6bb12c4e",
"senders": {
"k1": {
"output_type": "kafka",
"ca": "/etc/journalpump/ca-bundle.crt",
"certfile": "/etc/journalpump/node.crt",
"kafka_address": "kafka.somewhere.com:12345",
"kafka_topic": "journals",
"keyfile": "/etc/journalpump/node.key",
"ssl": true
},
},
"searches": [
{
"fields": {
"MESSAGE": "kernel: Out of memory: Kill process .+ \\((?P<process>[^ ]+)\\)"
},
"name": "journal.oom_killer"
}
],
"tags": {
"type": "container"
}
}
initial_position (default head)
Controls where the readers starts when the journalpump is launched for the first time:
head: First entry in the journaltail: Last entry in the journal<integer>: Seconds from current boot session
match_key (default null)
If you want to match against a single journald field, this configuration key defines the key to match against.
match_value (default null)
If you want to match against a single journald field, this configuration key defines the value to match against. Currently only equality is allowed.
msg_buffer_max_length (default 50000)
How many journal entries to read at most into a memory buffer from which the journalpump feeds the configured logsender.
journal_path (default null)
Path to the directory containing journal files if you want to override the default one.
units_to_match (default [])
Require that the logs message matches only against certain _SYSTEMD_UNITs. If not set, we allow log events from all units.
flags (default LOCAL_ONLY)
"LOCAL_ONLY" opens journal on local machine only; "RUNTIME_ONLY" opens only volatile journal files;
and "SYSTEM" opens journal files of system services and the kernel, "CURRENT_USER" opens files of the
current user; and "OS_ROOT" is used to open the journal from directories relative to the specified
directory path or file descriptor. Multiple flags can be OR'ed together using a list:
["LOCAL_ONLY", "CURRENT_USER"].
output_type (default null)
Output to write journal events to. Options are elasticsearch, kafka, file and logplex.
Writes journal entries as JSON to a text file, one entry per line.
file_output sets the path to the output file.
elasticsearch_index_days_max (default 3)
Maximum number of days of logs to keep in Elasticsearch. Relevant when
using output_type elasticsearch.
elasticsearch_index_prefix (default journalpump)
Elasticsearch index name to use when Maximum number of days of logs to keep
in Elasticsearch. Relevant when using output_type elasticsearch.
elasticsearch_timeout (default 10.0)
Elasticsearch request timeout limit. The default should work for most
people but you might need to increase it in case you have a large latency to
server or the server is very congested. Required when using output_type
elasticsearch.
elasticsearch_url (default null)
Fully qualified elasticsearch url of the form
https://username:[email protected]:port.
Required when using output_type elasticsearch.
ca (default null)
Kafka Certificate Authority path, needed when you're using Kafka with SSL authentication.
certfile (default null)
Kafka client certificate path, needed when you're using Kafka with SSL authentication.
kafka_api_version (default 0.9)
Which Kafka server API version to use.
kafka_topic (default null)
Which Kafka topic do you want the journalpump to write to.
Required when using output_type kafka.
kafka_address (default null)
The address of the kafka server which to write to.
Required when using output_type kafka.
keyfile (default null)
Kafka client key path, needed when you're using Kafka with SSL authentication.
journalpump is licensed under the Apache License, Version 2.0.
Full license text is available in the LICENSE file and at
http://www.apache.org/licenses/LICENSE-2.0.txt
journalpump was created by Hannu Valtonen <[email protected]> and is now maintained by Aiven hackers <[email protected]>.
Recent contributors are listed on the project's GitHub contributors page.
Bug reports and patches are very welcome, please post them as GitHub issues and pull requests at https://github.com/aiven/journalpump . Any possible vulnerabilities or other serious issues should be reported directly to the maintainers <[email protected]>.